Desmond,Your site has been a fantastic help and a super read ever since I looked on a long time ago. I purchased a few years ago from a local jeweler a 561 cal black dial stainless steel Constellation. It was fitted with a stainless steel bracelet 7912 marked 3/62 and Swiss made. These pages gave me a lot of 7912 understanding. Are you aware of just how the prices have gone through the roof on e-bay for these 7912 bracelet's? I presume because they also fit Seamaster models it makes them very saleable and are so early.I worked for the Swiss for many years selling a range of watchmaking machine tools including Ewag, Wahli,Gerber, etc and visited the Biel factory a number of times as well as some of the great clock and watch museums over there. I appreciate the working of my 561 as I am aware of the types of machines used in their manufacture.

Great information on this site, thank you for providing such a valuable service!I was hoping that you could help me with a buckle question for my 1966 Constellation. The case is solid 18k but the original buckle is missing. Would an original buckle for this model have been solid 18k to match the case or would it have been gold plate? Would there be a particular style buckle of the one's pictured that would most typically be associated with the Constellation circa mid 1960's? Also what would be the correct buckle size? Standard strap taper today seems to be 18-16mm but some vintage straps I notice are 18-14mm.

Yes, with an 18k Watch head it was normal for the buckle to be 18k as well. There were a number of buckles in that period, and either an 18-14 mm or 18-16mm would be correct, depending on the style of the buckle.

For some time now I have been interested in the Omega watches , I live in Guatemala and from here I want to congratulate you on your site, where I found very many Constellations information ... I would like to maintain communication with youto clarify some doubts ... John J. B. Luttmann Mail jjbrunon@hotmail.con

I am a long-term collector of vintage Omega watches with a passion for Omega Constellations of the fifties and sixties. This blog is offered as an educational resource for potential and existing collectors who wish to learn more about the brand and avoid the traps and pitfalls of buying in a global market.